Assassin/Ninja Help Inferno Spell/melee Hybrid

This thread is kind of hard for me to make because I've been working on the following build for months, I first had the idea for it over half a year ago and from there I started making multiple versions of it, So far there are about 30 to 40 different versions of it that I've made.

My idea was simple: Make an Inferno build that is focused on mana steal, Life steal, And exploding, While managing to have good defense and intelligence.
Spam spin attack until you're out of mana, And once you're out of mana just use melee to get it back up again, While also regenerating health and doing a bunch of damage with exploding on the way.

I have yet to make a version of this build that I am fully satisfied with, And I'm tired of trying.
This is my latest version: https://wynndata.tk/s/8LNIaC

My biggest problem with this version is the extremely low thunder and air defense, So if anyone can find a way of fixing that I'd be grateful.

On another note: I still haven't gotten a full answer regarding the subject of does endurance stack?
Because if it doesn't, There's the option of patching the defense a little bit more using powders.

Now than again, This is going to be a challenge, Trust me, I spent enough time trying to figure this out knowing that it's hard to manage, But I believe it is possible, And I believe some people can do it.

Farewell.​

 

proto build i just made, crazy lifesteal, high damage, but i still cant quite get high rainbow defense
https://wynndata.tk/s/h6Ytjp

 

This is actually very similar to one of my older versions (Tried out a bunch of combos with Conflagrate the day it came out).
Didn't think of using Ouroboros before though.
I'll look into it, Might find a way to improve.
Also R.I.P intelligence.

 

https://wynndata.tk/s/qoXIEC

 

https://wynndata.tk/s/uIgB8j

You might take a look at my hellstrand build that follows a similar goal as yours. It isnt what youre looking for, but it might help you out.
Opinions and Feedback always appreciated